@book{20428,
	author = {National Society for the Study of Education. and Hilgard, Ernest Ropiequet},
	title = {Theories of learning and instruction.},
	publisher = {NSSE; distributed by the University of Chicago Press},
	year = {1964.},
	series = {Yearbook of the National Society for the Study of Education [new ser.]},
	address = {Chicago}
}